正文

VOA慢速英语:美国各州使用无人机来预测山崩和观察野生动物

2019-05-27来源:和谐英语

Update Required To play the media you will need to either update your browser to a recent version or update your Flash plugin.

Words in This Story

avalanche – n. a large amount of snow and ice or of dirt and rocks that slides suddenly down the side of a mountain

survey – n. a study or investigation

certified – adj. having met the official requirements that are needed to do a particular type of work

nest – n. a place made or chosen by a bird for sheltering its young